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another article: http://www.linuxfly.org/post/320/?1. Pre- clean memory usage ?Free-m2. start cleaning up ??Echo 1 >/proc/sys/vm/drop_caches3. memory usage after cleanup ?Free-m4. complete !To view the number of memory bars command:Dmidecode?|? Grep?-a16? "Memory?" device$ " ?????++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++??????# Sync# echo 1 >/proc/sys/vm/drop_caches?? Echo 2 >/proc/

1. Forget the logon password of a user except sys and system.Log on to the conn sys/pass_word as sysdba as a sys (or system) user;Use the following statement to modify the password: Alter user user_name identified by newpass;Note: The password cannot be full of numbers. It cannot start with a number. Otherwise: ORA-00988: Password missing or invalid2. Forget the

Author: skate Time: 2012/02/22 Manually release Linux memory --/proc/sys/Vm/drop_cache Repost an article Linux memory View: [Root @ localhost 0.1.0] # Free-mTotal used free shared buffers cachedMem: 4032 694 3337 0 0 25 It should be noted that the used of mem is free + buffers + cached. In some cases, cached occupies a lot of resources and the value is incorrect. In fact, it does not affect actual use, the subsequent sections describe how to clear

There are a number of variations on this series of optimal values.1. Say you has an array for which the i-th element is the price of a given-stock on day I.If you were-permitted to complete at most one transaction (ie, buy one and sell one share of the stock), des IGN an algorithm to find the maximum profit.The simplest problem, there is a scenario: I came back from the future, I know a commodity in the bac

Fund manager killed not to say money shadyfinger-base winning trick one: Never fearBecause the measurement of an index fund is good, do not look at what Alpha Coefficient Sharpe index, as long as the tracking index of the error is not big. The smaller the tracking error, the better the Fund. So the index fund is always calm in waiting for the full position of the collapse or full of inflation in the state, he will not fear, he is always greedy! And in a bull market, do we need more fear or gree

The wolf came to the stock marketJuly 6 to determine the stock disaster, the national rescue began, after the first July 27 is a stock disaster, we still believe that the bull market, and then today's August 18 is a stock disaster thousand shares, this is the second stock di

I. First, think about the stock you bought before entering the market, and whether you don't need it for a short time. That is to say, it is a temporary idle money. 2. Select a stock to be bought. It is recognized as a good company. Such as Vanke and CMB. 3. Wait for the purchase time. (1) After the stock market has been greatly adjusted. (2) When the

Yesterday, my colleague said that a test database could not be logged on, with PLSQLDeveloper login prompt: ERROR: ORA-00604: erroccurredatrecursivesqllevel1or Yesterday, my colleague said that a test database could not be logged on, with PLSQL Developer login after the prompt: ERROR: ORA-00604: error occurred at recursive SQL level 1OR Yesterday, my colleague said that a test database could not be logged on. After logging on with PLSQL Developer, the following message is displayed: ERROR:ORA-00

How do I connect python to a trading software? How do I set the position of closing positions? Thank you so much! Reply content:I know what you mean, you just want to find a software or broker interface to upload trading instructions, your previous data capture and analysis may have been written by Python, so poor this trade instruction interface last step. For the stock of retail, the formal way is Warburg, Guo Xin, Societe Generale is willing to giv

Use the PHP Command Line Mode to collect stock trend information, and the php Command Line Let's just talk about the implementation code. The main function has only one class implementation (stock. class. php ): The call method in the command prompt is as follows (stock. php ): Direct use *\php.exe stock.php The stock